It's a kinda "professional" setting. They don't want the audience to see any paper on the floor or on amps, in stands etc...
Do you have a smartphone/tablet/computer? Oh... That's right. Please disregard.
Try this, maybe-
Open a text file/notepad, and make a set/song list using really simple notation that you can use quickly, i.e.
Song title 1- "A B A C x4 G x2 F# x2", etc. or whatever, for the songs in your set list. Make it really simple and easy to read and (hopefully) remember, but with enough info to be helpful. Save file. Pre-show, place phone/tablet/device of choice somewhere visible and accessible but as unobtrusive as possible (floor, top of amp, guitarist's back [ymmv] etc.) and play. Scroll as needed.
The best part, ime? Even when said device can't be used as above, the process of making the list helped me remember.
Like, a whole lot.
Once had to learn 35 (not super easy) songs in a weekend. This worked for me. Also, make a recording of said songs you can play as often as you can stand while you study, garden, do the dishes, etc, beating them into your subconscious. Unconscious learning, and all that. Again, worked for me.
Besides that?
Try to play as if seemingly the most amazing, sensitive, beautiful, attractive, wealthy, awesome, and obviously "into you" person you could ever imagine is sitting front and center, with all attention on you. Don't disappoint them.
